Diamond



FIG. 1 is a top perspective view of a diamond showing my new design;

FIG. 2 is a bottom plan view;

FIG. 3 is a top plan view;

FIG. 4 is a rear plan view;

FIG. 5. is a front plan view; and,

FIG. 6 is a right side plan view, the left side plan view being identical.

The portions of the diamond shown in broken lines in the Figures are for environmental purposes only and form no part of the claimed design. 

The ornamental design for a diamond, shown and described in the drawings. 